This is a read-only Slack integration that gives Claude access to your workspace without any write permissions. You get 15 tools covering the essentials: channel history, thread replies, message search, user profiles, file metadata, reactions, and starred items. It uses user OAuth tokens (xoxp-) for authentication and skips the official SDK in favor of direct HTTP calls via httpx, making the codebase easier to audit. The security model is worth noting if you're cautious about connecting AI to internal comms. Reach for this when you want Claude to search through Slack history, summarize threads, or pull context from channels without worrying about accidental posts or deletions.
claude mcp add --transport stdio io.github.crunchtools-slack uvx slack